Free Access

Fig. 1


Sketch of the setup of the ALMA correlator during the spectral scan observations in the ALMA band 6. The observations are divided into two frequency ranges: low frequencies from 211 to 246 GHz and high frequencies from 240 to 275 GHz. Each frequency tuning is depicted with a different color, while the different boxes refer to the four spectral windows per tuning. The number of the spectral windows, as given in the ALMA observations, are given on top of each box. The gray line shows the transmission of the atmosphere at the ALMA site with a precipitable water vapor of 0.7 mm.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.